class: bundle: support incremental image property
class: bundle: support incremental image property

To build bundles with incremental support, we need to define the new property
for relevant images. As RAUC 1.7 already supports (and then ignores) this
property, we can add the support now.

Signed-off-by: Jan Luebbe <3a82f1ac4ad59607a20f180f1c67ac8ba31ad0d5@pengutronix.de>

rauc/meta-rauc,rauc/meta-rauc,rauc/meta-rauc,rauc/meta-rauc